@book{1979-hardy
,edition={5th}
,title={{An introduction to the theory of numbers}}
,booktitle={{An introduction to the theory of numbers}}
,author={Godfrey H. Hardy and E. M. Wright}
,ISBN={0--19--853170--2}
,MR={81i:10002}
,publisher={Oxford University Press}
,year={1979}
}